//
//  UIBarButton+Category.swift
//  微博
//
//  Created by expai on 16/5/6.
//  Copyright © 2016年 guangJun.com.cn. All rights reserved.
//

import UIKit

extension UIBarButtonItem{
    
    //如果在func前面加上class，就相当于OC中的＋
    class func creatBarButtonItem(imageName:String, target: AnyObject, action:Selector) ->UIBarButtonItem {
        let btn = UIButton()
        btn.setImage(UIImage(named: imageName), forState: UIControlState.Normal)
        btn.setImage(UIImage(named: imageName + "_highlighted"), forState: UIControlState.Highlighted)
        btn.addTarget(target, action: action, forControlEvents: UIControlEvents.TouchUpInside)
        btn.sizeToFit()
        return UIBarButtonItem(customView:btn)
    }
}